NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 561
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-03-09 | 561-336-7XXX | 7000–7999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOYNTONBCH | FL |
| 2009-05-06 | 561-263-0XXX | 0000–0999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-1XXX | 1000–1999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-2XXX | 2000–2999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-3XXX | 3000–3999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-4XXX | 4000–4999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-5XXX | 5000–5999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-6XXX | 6000–6999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-7XXX | 7000–7999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-8XXX | 8000–8999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2009-05-06 | 561-263-9XXX | 9000–9999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | JUPITER | FL |
| 2007-12-19 | 561-228-2XXX | 2000–2999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2007-12-19 | 561-228-3XXX | 3000–3999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2007-08-21 | 561-894-7XXX | 7000–7999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | DELRAY BCH | FL |
| 2007-03-15 | 561-370-1XXX | 1000–1999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2006-10-24 | 561-633-4XXX | 4000–4999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2006-05-15 | 561-598-7XXX | 7000–7999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-202-0XXX | 0000–0999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-202-9XXX | 9000–9999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-233-9XXX | 9000–9999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-253-8XXX | 8000–8999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-0XXX | 0000–0999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-1XXX | 1000–1999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-2XXX | 2000–2999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-3XXX | 3000–3999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-5XXX | 5000–5999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-6XXX | 6000–6999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-7XXX | 7000–7999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-8XXX | 8000–8999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-422-9XXX | 9000–9999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-491-8XXX | 8000–8999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-493-6XXX | 6000–6999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-629-8XXX | 8000–8999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2003-07-25 | 561-784-6XXX | 6000–6999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-0XXX | 0000–0999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-1XXX | 1000–1999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-2XXX | 2000–2999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-3XXX | 3000–3999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-4XXX | 4000–4999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-5XXX | 5000–5999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-6XXX | 6000–6999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-7XXX | 7000–7999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-8XXX | 8000–8999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-12-05 | 561-548-9XXX | 9000–9999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2002-03-21 | 561-784-2XXX | 2000–2999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2001-11-20 | 561-514-1XXX | 1000–1999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2001-11-20 | 561-514-5XXX | 5000–5999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2001-11-20 | 561-514-6XXX | 6000–6999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2001-11-20 | 561-514-7XXX | 7000–7999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
| 2001-06-05 | 561-207-5XXX | 5000–5999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | WPALMBEACH | FL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.